[boost] [test] Re: [thread/exception] trivial compile fix

(adding test to the subject line)

...

not sure, why enable_if is not resolved, but came across the issue before in boost.parameter, when i added boost.heap into trunk. the fix is trivial, as it just specifies the scope of enable_if ...

no idea, why i triggered this issue with both boost.heap and boost.lockfree ...

I suggest we first figure out why and then make changes. :)

frankly, i *really* don't care, about this issue, especially as it is trivial to solve with the patch that i have posted. iac, including the headers that trigger the issue (like boost/thread.hpp) before including boost/test/unit_test.hpp works around this bug.